Characterization of the VIIRS DNB mid-gain stage using observations of bright stars

Truman Wilson; Xiaoxiong Xiong

doi:10.1117/12.2680313

19 October 2023 Characterization of the VIIRS DNB mid-gain stage using observations of bright stars

Truman Wilson, Xiaoxiong Xiong

Proceedings Volume 12729, Sensors, Systems, and Next-Generation Satellites XXVII; 1272918 (2023) https://doi.org/10.1117/12.2680313
Event: SPIE Remote Sensing, 2023, Amsterdam, Netherlands

Abstract

The VIIRS Day/Night Band (DNB) is a panchromatic band ranging in wavelength from 500-900 nm. The DNB uses three gain stages to span over seven orders of magnitude of dynamic range and can observe scenes as dim as city lights at night up to sunlight reflected off clouds during the day. While the space-view port is typically used to measure the background signal for most VIIRS bands, for the DNB, it has been shown that the High-Gain Stage (HGS) is able to observe bright stars down to magnitude +7 with good sensitivity. The star observations have been used to assess the gain trending, spectral response, and for intercomparison of the DNB between sensors on different platforms (such as SNPP and NOAA-20 VIIRS). In this work, we extend our previous methodology to perform calibration assessments of the DNB Mid-Gain Stage (MGS). For the MGS, stars brighter than approximately magnitude +3 generate sufficient signal for our assessments. In addition to gain stability and instrument intercomparisons, these observations can also be compared to the HGS star observations on the same platform. This allows us to derive the MGS/HGS gain ratio independently from the solar diffuser observations.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Truman Wilson and Xiaoxiong Xiong "Characterization of the VIIRS DNB mid-gain stage using observations of bright stars", Proc. SPIE 12729, Sensors, Systems, and Next-Generation Satellites XXVII, 1272918 (19 October 2023); https://doi.org/10.1117/12.2680313

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